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Pressure vessels, wall thickness

  1. Dec 4, 2013 #1
    20 m3 of gas at a pressure of 25 bar is to be stored in a cylindrical
    pressure vessel 2 m long. Given the following information :
    The yield strength of the vessel material is 14,000 psi
    If a factor of safety of 5 is to be used, determine:

    (a) Whether the vessel should be treated as a thin or thick cylinder.
    (b) The wall thickness required for the pressure vessel

    The information I have gathered to date is

    14,000psi= 14,000 / 0.14503773773=9.6526602 x 10^6 Pa
    20m^3=20,000Litres
    Pressure of gas=25bars-2500kpa=2.5 x 10^6
    V=∏r^2h
    r=√v/∏h=1.784 Metres
    D=2r=3.568 Metres


    These are all the values I have at the moment. Hopefully as I continue to try and solve it solve kind soul may see this post and give me a nudge in the right direction. Many thanks in advance....
     
  2. jcsd
  3. Dec 4, 2013 #2
    Hoop stress= yield strength / safety factor = 19.3 x 10^6
    thickness= pr/hoop stress = 0.231m =231mm
    so I conclude that the cylinder is thick walled and is a 7.222
    and the minimum wall thickness must be 231mm

    Could someone tell if this is correct and answers the questions suitably please
     
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